Refactor game state management to use a unified Stat system and update UI labels for production and corruption

Scripts/Core/Effects/ApplyBuffEffect.cs

@@ -5,9 +5,7 @@ namespace ParasiticGod.Scripts.Core.Effects;
 [GlobalClass]
 public partial class ApplyBuffEffect : Effect
 {
-    public enum BuffTarget { FaithGeneration }
-    
-    [Export] public BuffTarget TargetStat { get; set; }
+    [Export] public Stat TargetStat { get; set; }
     [Export] public float Multiplier { get; set; } = 2.0f;
     [Export] public double Duration { get; set; } = 30.0;
     
@@ -21,4 +19,9 @@ public partial class ApplyBuffEffect : Effect
         
         gameState.ActiveBuffs.Add(newBuff);
     }
+
+    public override string ToString()
+    {
+        return $"Apply Buff: x{Multiplier} to {TargetStat} for {Duration} seconds";
+    }
 }